mineral

Sugilite

KNa2(Fe,Mn,Al)2Li3Si12O30

Hardness: 5.5-6.5 on the Mohs scale, Color: Pinkish-purple, violet, magenta, yellowish-brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal, Cleavage: None, Specific Gravity: 2.74-2.80

Hardness: 5

Identified August 2, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on the Mohs scale, Color: Pinkish-purple, violet, magenta, yellowish-brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal, Cleavage: None, Specific Gravity: 2.74-2.80

Formation & geological history

Formed in manganese-rich metamorphic environments and alkaline igneous intrusions, often associated with rich orebodies. Ages vary depending on the specific geological deposit.

Uses & applications

Used primarily as an ornamental gemstone for jewelry, cabochons, carvings, and highly sought after by mineral collectors.

Geological facts

First discovered in 1944 by Japanese petrologist Ken-ichi Sugi, sugilite is celebrated for its rich royal purple color, which is often attributed to trace amounts of manganese.

Field identification & locations

Can be identified in the field by its distinctive vibrant purple to magenta coloration interwoven with dark matrix or lighter silicate bands. Major deposits include South Africa and Japan.